adverse
antagonistic, conflicting, contrary, detrimental, disadvantageous, hostile, inexpedient, inimical, injurious, inopportune, negative, opposing, opposite, reluctant, repugnant, unfavourable, unfortunate, unfriendly, unlucky, unpropitious, unwilling
Antonyms
advantageous, auspicious, beneficial, favourable, fortunate, helpful, lucky, opportune, promising, propitious, suitable